The 20DPE-30 Differential Pressure Swichgage® is a 2" dual-scale dial, diaphragm-actuated differential pressure-indicating gage with a built in snap-acting SPDT switch, instead of the single pole/pointer contacts. This switch is used for tripping alarms and/or shutting down equipment. The 20DPE-30, with a pressure range of 0-30 psi, is intended to monitor and indicate oil, fuel or water filter restriction and can reduce the risk of dangerously high pressure which may rupture the filter, resulting in contaminants entering the system. This filter restriction Swichgage® will let you know when to change your filter and maintain peak efficiency.

The gage mechanism is enclosed in a steel case coated to resist corrosion. A polycarbonate, break-resistant lens and a polished, stainless steel bezel help protect this rugged instrument. This model features an internal snap-acting SPDT switch, instead of the single pole/pointer contacts. When the switch closes on rising pressure, it becomes set. As pressure falls the switch resets. Contacts are grounded through the case and have a self-cleaning motion to ensure electrical continuity.